Radar Studies of the Ionosphere at Nonequatorial Latitudes

我们建议将目前由美国国家科学基金会资助的ATM-8721669研究项目再继续三年。大部分工作将归入以下三个领域之一：(1)非相干散射研究，特别是在高海拔地区，(2)极光雷达研究，以及(3)与赤道相似的温纬E区等离子体不稳定性研究，也可能是温和的纬度扩散F，也可能致力于PMSE(极地中间层夏季回波)的研究。在这些领域中的大多数地区，一项积极的研究方案已经在进行中；在某些情况下，该方案已经存在多年，并产生了可观的科学回报。

We propose to continue for three more years the research program currently supported by NSF Grant ATM-8721669. Most of the work will fall into one of three areas: (1) incoherent scatter research, particularly at high altitudes, (2) auroral radar studies, and (3) studies of temperate latitude E-region plasma instabilities similar to those seen at the equator, and perhaps also temperate latitude spread F. Some effort may also be devoted to PMSE (polar mesospheric summer echoes) research. In most of these areas an active research program is already underway; in some cases the program has existed for a number of years and has produced a substantial scientific return.